As Maria and Carla stood in the kitchen talking, a car drove by the house. The music was blaring so loudly thatMaria commented: "that loud music makes it seem like my heart is beating with he music!" Well, something is beating with the music, " shouted Carl. "Look at the windows!" The windows in the kitchen were vibrating to the beat of the music from the car.

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?

Which of the following statements accurately describes the sign of the work done on the box by the force of the push? a. positive b. negative c. zero